Pencil.



L. H. SONDHEIM.

PENCIL.

APPLICATION FILED NOV. I. 1915.

1,187,018. Patented June 13, 1916.

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I71 verztar UNITED "STATES PATENT orFIc LEWIS H'. soivnnnm, or NEwYon'K,N. Y.

PENCIL.

7 To all whom it may concern:

Be'it known that'I, LEWIS H: SonDHnI'M, a citizen of the United States,residing in the city of New York, countyand State of her 2nd, 1915, thepresent improvement consisting of the construction ofthe pusher and.

the parts attached tosame; a variation from said former constructionbeing shown also in the position and shape of the recesses in theactuating tube.

Reference is to be had: to the accompanying drawings forming a part ofthis specification, inwhich similar letters of reference indicatecorresponding parts in all the figures.

Figure 1 is a side view of a pencil embodymglmy invention, the partsvisiblebeing in t e normal position showing the pencil ready for use.Fig. 2is a sectional elevation showing the interior parts in the samenormal position as in Fig. 1; Fig.3 is a sectional elevation of .abroken away part of the" pencil giving a view from a point atapproximately a right angle to that of Fig. 2, and showing the groove inthe bore and the extensionof the pusher which enters and'movesin' same.Fig. 4:- is a sectional elevation of a portion of the pencil from theview point of Fig. 2 'butshow ing the position of? the pawl inthetubeafter the latter has been rotated to allow 1 45' the lead and thepuslierto be forced .rearpencil taken on the line 5'5' in Fig. 2 and wardly.Fig. 5 is across section of the showing the pawl-end resting in one ofthe recesses of the'actuating tube. similar cross sec tion,-butshowingthe tube rotated from its position in'Fig. 5' and the end of the pawlfreed from the teeth of saidtube. Fig. 7 is a perspective .-vi ew of-thebody portion of the pusher and the pawl,

the end of the latter being shown slightlyv bent to one side. Fig. is aperspective view of an attachment to the pusher, con- Fig. 6 is aSpecification of Letters ratent. Patented Ju ne' 13, 19 16,. Applicationflleu r1 cvember 1, 1915. Serial No. 59,096.

slsting of a circularly. bent plate of 'metal, which serves to impart tosaid pusher a frictional hold upon the walls of the bore in the casing,and which-for brevity-I will herein call a circularly formed attachment.Fig. 9 is a perspective view of a -modified form of the circularlyformed at- 'shown more. or less enlarged.

The casin orshell A is preferably made of wood tape ed at the forwardend and has an enlarged bore-B. to receive the lead L i and its holdingand adjusting mechanism presently described. ,At the tapered end of thecasethe bore B is so narrow as to be capable of exerting a slightfriction upon the lead sufficient to.v prevent it fro dropping out ofthe casing. Opposite t e point where the tapered end emerges into thecylindrical part of the case, the bore widens and from this point thereis a longitudinal groove 0 which communicates with the bore I Bandextendsto the rear of the casing."

In the bore B is placed an actuating tube V D, havinga wide longitudinalslot 1 and a series of teeth 2, forming pawl-engaging. I

recesses 3, along one edge of said slot; Said.

tube extends beyond the rear end of the easing A and is there firmlyattachedto a rota-. table and longitudinally reciprocating push cap E,moving upon a ferrule F- which is attached to ,the casing A, the forwardend ofthe cap being slightly bent' inward at 4, and the rear end of theferrulebeing slightly bent outwardat 5 so as to limit the rearwardmovement ofthe cap, said cap being a sim-- ple means of moving the tubeD in longitu-f dinally. reciprocating vdirection' as well as" meNovember 2nd, 191

. The lead 1. fits the tube .D' so than while is. prevented from shakingtherein, it will not frictionally bind a. Within the actuating tube D isloosely fitted a pusher G consisting of a body portion 6, which lieswithin said tube, the outwardly extending part 7 which passes throughthe slot of said tube, the pawl 8 and the pawl-head 9, and which ispreferably formed from a piece of flat spring-metal, the pawl-head 9being bent slightly to one side to form a detent to enage the recessesat the edge of the tube D. urrounding the tube D is a short piece ofspring metal S of circularly bent form which distends outwardly so asto'frictionally fit the walls of the bore B when compressed into saidbore, but which allows the tube D to move within it without materialfriction, and to which is firmly attached the extending part 7 of thepusher in such manner that said part projects beyond the outer surfaceof said circularly formed attachment S through its recess 10 and intothe groove C of the casing A, in which it fits so loosely that saidgroove exerts no resistance upon its movement longitudinally, butprevents it from rotary movement. *I have shown a modified form of theattachment S in Fig. 9, consisting of a completely closed cylinder Thaving the slot 11,-wh1ich may perform the same function astheattachment S, provided it be so closely adjusted to the bore B as tohave the necessary fric rotated so as to bring said recesses 1n linewith the pawl-end and cause the latter to rest in one of them or entersame upon any slight pressure upon the lead point. e

If it is desired to advance the lead, the

cap E with the tube D is moved forward and then drawn back.'. In itsforward movement the forcible pressure exerted will overcome thefriction-hold of the circularly formed part S of the pusher uponthe'walls'of the bore B, and-the pusher and the lead, which abuts theforward end of said pusher will be advanced. In its rearward movementthe.

pawl-end willride over the teeth of the tube, the frictionalfhold-of thepart S upon the walls of the bore B preventin g the pusher To move'th elead rearward, with the tube is rotated in such direction as to causethetoothed edge of the latter to move away from the pawl-head 9: and untilthe opposite smooth edgeof the tube abuts the side of the pu'sher-body6, whereupon ,with the tub the push cap the projecting part of the leadhas been .1

pushed-into the casing.

In the modification shown in Fig. 11 the groove 0 and such part of theextension 7 of the pusher G, as projects beyond the outer surface of theattachment S, which are 7 shown in Figs. 5 and 6, are dispensed with andthe frictional contact of the said attachment S with the walls of thebore B whether said frictional contact be caused by the distendingaction ofthe attachment ita self, or by the pressure upon saidattachment exerted by the body of the pusher-is relied upon to resistrotarymovement of the pusher to such extent, that when the cap E e D isrotated to move the toothed edge of the latter toward the pawl head 9said resistance will cause said head 9 to contact with said toothed edgeand enter one of the recesses 3, while upon the reversed rotation of capand tube it would cause the pawl head 9to be freed from the toothededge, the rotation of the cap and tube, which in the construction shownis not limited, being continued in either case until the respective edgeofthe tube contacts with thepawl head 9 or the pusher body 6.

I do not limit myself to the details of construction which I have shown,as certain parts may be slightly changed without departing from thespirit of my invention. For instance, I do not limit myself to the useof a spring-pawl in the pusher, but consider the use of any means tobring a longitudinally reciprocating and rotatably movable actuatingtube into engagement and again out of engagement with a pusher as withinmy lnvention, provided the same be 1 used in connection with anattachment to the pusher on the outside of the tube having greater orlesser extent laterally and formed cylindrically shaped inner walls ofthe bore B, and which restrains the pusher from being moved undesirably,overcoming the incidental and minor fr1ction of the pusher with theactuating tube by -reason of the greater potential friction of saidattachment with a portion of the walls of said bore B. Having describedmy invention, I claim: 1. In a pencil, the combination of an outer shellhaving a central bore, a longitudinally reciprocating and rotatablymovable lead. containing tube in said bore, provided with a longitudinalslot, a lead in said tube, 7 sufficient width to allow the tube to havea turning movement relatively to the pusher, the tube and the pusherbeing respectively provided with means wherewith to engage each other,the rotary movement of the tube 1 11 to adaptitself with frictionalcontact to the, v

propelling pusher. the slot of the tube being of 15 serving to bringsaid tube into and again out of engagement with the pusher, and theforward movement of said tube servingto move the pusher forward'when inengagement with same, the pusher having an extension which passes theexterior surface of the tube through the slot of the latter, saidextension having aflixed thereto on the outside of the tube a circularlyformed attachment which bears with potential frictional contact upon thewall of the bore in the casing to restrain the pusher from being carriedrearward by frictional contact of any of its-parts with the tube duringthe 15 rearward movement of said tube.

' 2. In a pencil, the combination of an outer shell having a centralbore, a longitudinally reciprocating and rotatably movable leadcontaining tube in said bore, provided with a longitudinal slot and alongitudinally ranged series of recesses forming pawlengaging surfaceshoulders, a pusher within said tube provided with a spring-pawl toengage said pawl-engaging shoulders when the pawl-end is in line withthem, the pusher having; an extension which passes the exterior surfaceof the tube through the slot of the latter, said extension havingaflixed thereto on the outside of the tube, a circularly formedattachment which bears with potential frictional contact upon the wallof the bore in the casing to restrain the pusher from being carriedrearward by frictional contact of either of its parts with the tubeduring the rearward movement of said tube, the slot of the tube being ofsuflicient width to allow the tube to have a turning movement relativelyto the pusher to bring the end of the pawl out of engagement and againinto engagement with the surface 4 shoulders ofsaid tube.

New York, October 28, 1915.

LEWIS H. SONDHEIM.

Witnesses:

0.. H. HARNEY, FRANCIS FREUDENvoLL,'J r.

